The systems described in this disclosure can be used in construction settings to facilitate the tasks being performed. The location of projectors and augmented reality headsets can be calculated and used to determine what images to display to a worker, based on a map of work to be performed, such as a construction plan. Workers can use spatially-aware tools to make different locations be plumb, level, or equidistant with other locations. Power to tools can be disabled if they are near protected objects.